Ibiza Rocks and Itaca (inside or upstairs) have some good nights. We had one of our best nights at Ibiza Rocks last year when Doorly was playing, would have been pleased to have paid to be in there that night. Good club when they close everything off, a decent sound system and quality tunes.
The Bay Bar can be decent; some of the music that was getting played last year when Blue was hosting was atrocious though.
Tulp can also be a decent place for cocktails and to listen to some nice tunes, but more laid back than other places.
The old Pussycat now being rebuilt as Rio looks like it could be interesting.
The Sunset Strip is always busy and you can get to hear some decent DJs at pre parties (Mambo, Café Del Mar and Savannah) Savannah sometimes has parties in their back room.
Kanya has had some decent nights in the past, but nothing appealing to me of late, might change this year.
Villa Mercedes normally has something on and even if you aren’t eating you can pop in for cocktails and watch the show (I highly recommend Paco Fernandez if he is playing there this year, simply outstanding!)
I always like the bars around the Church Square in San Antonio; you could be anywhere in Spain and a lot more traditional than most of San Antonio. More laid back and chilled, but just nice to have a few drinks with friends and avoid the traditional tourist.